<!--变量的作用域-->
<!DOCTYPE html>
<html lang="en">

<head>
    <!-- Google Fonts Pre Connect -->
    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
    <link rel="preconnect" href="https://fonts.googleapis.com">
    <!-- Meta Tags -->
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <!-- Fonts Links (Roboto 400, 500 and 700 included) -->
    <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap">

    <!-- CSS Files Links -->
    <link rel="stylesheet" href="./styles.css">

    <!-- Title -->
    <title>Simple Page</title>
</head>

<body>

    <script>
        let myName = "joker";
        alert(myName);
    </script>
</body>

</html>